I don't know why people think that Uchihas are useless without their eyes, to me it's like saying senjus are useless without mokuton. They always depend on it. Uchihas have used amazing firestyle technique and other stuff like a barrier without their eyes.
Senjus are known to inherit the yang of the sage while the uchihas have yin. They're not limited to a sharingan or mokuton, the only one person in the senju that had mokuton (from what we know) and back then and a few Uchihas awakened their sharingans too. So since they didn't have their eyes yet, were they useless? No, Izuna as a kid did very well and their father didn't use his sharingan when fighting Butsuma senju.
And he was evenly strong with Taijama Uchiha. Mangekyo Sharingan didn't even exist at that time because adult Izuna and Madara were the first in their clan to awaken the mangekyo sharingan
So there's something that we should consider there.
Maybe back then they were using several Uchiha kinjutsu to compensate if they were unable to use their eyes.
I'm sure there's other techniques out there that doesn't require a sharingan like Izanami or Izanagi.
On a side note. I'm sorry Hyuuga clan members because they aren't well diverse in terms of kekkai genkai benefits, but I'm sure they'll need byukgan for all their taijutsu except for Air palm technique.
But to say the least, wouldn't you agree?
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Maybe back then they were using several Uchiha kinjutsu to compensate if they were unable to use their eyes.
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On a side note. I'm sorry Hyuuga clan members because they aren't well diverse in terms of kekkai genkai benefits, but I'm sure they'll need byukgan for all their taijutsu except for Air palm technique.
But to say the least, wouldn't you agree?